Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11494888 | Work terminal, oil leakage detection apparatus, and oil leakage detection method | Li Lu, Akira Nishimizu, Akira YAMAGISHI | 2022-11-08 |
| 11249137 | Diagnostic method of switchgear and device thereof | Masaru TATEMI, Masanori Otsuki, Akira Takahama | 2022-02-15 |
| 10755442 | Oil leakage detector and oil leakage detection method and image processing unit | Li Lu, Satoshi Ichimura, Tomohiro Moriyama, Jun Nukaga, Akira YAMAGISHI +1 more | 2020-08-25 |
| 10615590 | Switch operating characteristic monitoring device, switch equipped with same, and switch operating characteristic monitoring method | Masaru TATEMI, Makoto Hirose, Hideaki Uchiyama | 2020-04-07 |
| 10509021 | Diagnosing device for on-load tap changing apparatus, diagnosing method for on-load tap changing apparatus, and diagnosing device for transformer | Li Lu, Yoshio Hamadate, Akira YAMAGISHI, Hideyuki Miyahara | 2019-12-17 |
| 10190935 | Gas leak detection device and gas leak detection method | Hisao Inami, Makoto Hirose, Hiroyuki Nakamichi, Masaru TATEMI | 2019-01-29 |
| 10113933 | Leakage oil detector system and method | Li Lu, Tomohiro Moriyama, Jun Nukaga, Akira YAMAGISHI, Yasutomo Saito | 2018-10-30 |
| 9898830 | Oil leakage detector and oil leakage detection method | Li Lu, Satoshi Ichimura, Tomohiro Moriyama, Jun Nukaga, Akira YAMAGISHI +1 more | 2018-02-20 |
| 9899172 | Circuit breaker and circuit breaker operating method | Hajime Urai, Yasuaki Aoyama, Hiroaki Hashimoto, Katsuhiko Shiraishi, Tatsuro Kato +2 more | 2018-02-20 |
| 9520699 | Switchgear | Hajime Urai, Yasuaki Aoyama, Hiroaki Hashimoto, Tatsuro Kato, Ayumu Morita +1 more | 2016-12-13 |
| 8804298 | Gas insulated bus and particle removal method for gas insulated bus | Tatsuro Kato, Hisashi Urasaki, Ryoichi Shinohara | 2014-08-12 |
| 7256584 | Method and system for measuring partial discharge | Tomohiro Moriyama, Tatsuro Kato, Fumihiro Endo, Ryoichi Shinohara | 2007-08-14 |
| 7193172 | Gas-insulated switchgear tank | Yoshitaka Yagihashi, Fumihiro Endo, Tomoaki Utsumi, Shunji Ito, Takashi Omori | 2007-03-20 |
| 6759616 | Gas insulated switchgear | Fumihiro Endo, Kenji Tsuchiya, Toyokazu Tanaka | 2004-07-06 |
| 6680453 | Gas insulated switchgear | Fumihiro Endo, Kenji Tsuchiya, Toyokazu Tanaka | 2004-01-20 |
| 6661235 | Method and device for detecting a partial discharge in an electrical device | Hirohiko Yatsuzuka | 2003-12-09 |
| 6424162 | Insulated device diagnosing system that prepares detection data from partial discharge signal such that periodic elements are given to different specific frequencies of the partial discharge signal | Fumihiro Endo, Tokio Yamagiwa, Ryouichi Shinohara | 2002-07-23 |
| 6218627 | Bushing | Katsuji Shindo, Fumihiro Endo, Tokio Yamagiwa | 2001-04-17 |
| 5982181 | Insulated device diagnosing system for diagnosing device based upon partial discharge signal data analyzed by frequency | Fumihiro Endo, Tokio Yamagiwa, Ryouichi Shinohara | 1999-11-09 |
| 5689088 | Gas insulated device, gas insulated switchgear, gas insulated bus line, and cable direct-coupled gas insulated switchgear | Fumihiro Endo, Tokio Yamagiwa, Kenji Anno | 1997-11-18 |